i agree that in my limited experimentation that saddle and bridge pins do effect tone. I tried a bone saddle, ebony and bone bridge pins on my 09 songwriter and immediately swapped them back out for their tusq counterparts
i know im in the minority here but the tusq serves the sweet brightness on my sitka/rosewood/ebony SW much better (to my ear) than the bone and ebony components. I instantly heard a dulling or mellowing of the highs and a more prominent mid range
im also in the minority as it seems that there is no songwriter discussion in here!